Create grammar file for speech recognition

However, this can sometimes negatively affect Speech Recognition performance for example, if a user is using speakerphone, it may pick up trailing audio from what you are playing back. The score that is returned by the Speech Recognition engine ranges from Generally, anything above a could be considered a good positive score. Often, you will want to allow users to enter digits or use Speech. This code example, shows how to do so. When using Speech or Digits, you will want to get the termination code, and depending on what the termination code is you will need to handle accordingly.

MaximumDigits Property. This is a very simple example of using Speech Recognition technology. Asked 12 years, 10 months ago. Active 7 years, 2 months ago. Viewed 5k times. Improve this question. Hertanto Lie. Hertanto Lie Hertanto Lie 7, 6 6 gold badges 26 26 silver badges 27 27 bronze badges.

Can you cite an example? Add a comment. Active Oldest Votes. Improve this answer. Yuval F Yuval F I know. I'm sorry. I'm talking more in terms of speech reco. Eric Brown Eric Brown Christoffer Christoffer You should find that for a very small set of words, then the current research as it stands will be extremely effective.

What is still an unsolved research problem is machine transcription and also improved speech recognition for large words. Transcription being the situation where you open a laptop in a lecture, then without any training, it automatically transcribes the lecture for you - whereas mere speech recognition tends to require training, and the speaker has to take care to ensure that their speech is good.

Pete Pete Sign up or log in Sign up using Google. Each grammar and the underlying concepts should therefore be strictly limited in scope, so that a specific grammar coincides with a specific part of a typical user interface, such as a toolbar or a dialog box. All grammars associated with a recognizer are inactive at first and will be activated as needed.

A grammar file structure. The textual representation of a grammar file consists of:. The following non-terminal declarations are required for the following types of non-terminals:. A grammar file header consists of:. The language of the grammar has to be explicitly defined in the header of the grammar by using of the PspLanguage attribute the values are defined in the SmIa.

LanguageId enumeration. The language of a grammar also has to match the language of the recognizer engine it is loaded into. Type declarations : declarations of all possible attributes are made in the declaration section of the header part of grammar file. In the declaration section all attributes have to be declared along with their specific type and concept to which they related. The following are possible generic types: boolean, integer, float, date, string, and list.

Definitions of rules contain information about defined concept. For each concept there need to be:. A concept definition can be also recursive, i. The grammar definition can optionally contain O nly defined attributes in declaration section can be used within definition of rules area of a grammar file.

Please note that defined attributes will be available to your application once command has been recognized via SSemanticAttribute SafeArray parameter of OnCommand event.